Based on the homogeneity-adjusted and quality-controlled monthly maximum and minimum temperatures from meteorological stations in China from 1979 to 2014, the changing trends of 806 meteorological stations are analyzed and compared, and the contribution rate of each season to warming slow down are calculated. The result shows that the extreme temperatures in China have undergone warming slow down or cooling, while the responses of seasonal extreme temperatures to global warming slow down are quite different. Compared to that in 1979-1999, extreme temperatures in spring and winter in most regions in China had warming slow down or cooling phenomena in 2000-2014, and the magnitude of warming slow down or cooling in summer was obvious in the north of the Yangtze River basin, while there was an apparent warming phenomenon, especially, for the minimum temperature in most of areas of China in autumn. The most regions in spring have significant tendency for warming slow down or cooling of the extreme temperatures, but in autumn, summer and winter only parts of regions occur warming slow down or cooling. What′s more, autumn is the dominant season, when warming of the minimum temperature occurs in a lot of regions in China. The trend of warming slow down or cooling may be regulated by the cold phase of Pacific Decadal Oscillation (PDO) in most regions in 2000-2014, but the cold phase of PDO may have more influence range on the minimum temperature.